When the power goes off in a device in a linux based system, one can think of ways in which this event can be handled in the applications running on it. One thing to note is that, when you plug the power cable off, the power doesn’t really go off immediately. But this needs to be notified to processes so that they can handle such an event and save the state of the application (if any). ...
kubernetes has been around for some time now. At the time of writing this article, v1.14.0 is the latest release and with each new release, they have a bunch of new features. This post is about the initial setup for getting the kubernetes cluster up and running and assumes that you are already familiar with what kubernetes is and a rough idea on what the control plane components are and what do they do. I gave a talk on the same subject of self-hosting kubernetes in DevOpsDays India, 2018 ...
Canary deployment pattern is very similar to Blue green deployments, where you are deploying a certain version of your application to a subset of your application servers. If everything is alright and you have tested out that everything is working fine, you route a certain percentage of your users to those application servers and gradually keep increasing the traffic till a full rollout is achieved. One of the many reasons to do this can be to test a certain feature out with a percentage of users who use your service. This can be further extended to enabling a service to users of a particular demographic. ...